Ophthalmic mounting.



J. C. WELLS.

`UPHTHMIVHC IVIOUNTNG.

APPLICATION FILED ocT. f6. 1911.

Patented May 6, 1919.

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ATTORNEYS JOEL C. WELLS, 0F SGUTHBRDGE, MASSACHUSETTS.

OPI-ITHALMIC MOUNTING.

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Specification of Letters Patent.

Patented May 6, lilith Application filed 0ct0bel 1G, 191'?. Serial No. 196,837.

To all whom it may concern:

Be it known that l, JOEL C. WELLs, a citizen of the United States, residing at Southbridge, in the county of Worcester and State of Massachusetts, have invented certain new and useful Improvements in Ophthalmic Mountings, of which the following is a specification.

This invention relates to improvements in ophthalmic mountings and has particular reference to that type of mounting employing resiliently actuated pivoted guard members of what is commonly known as the fingerpiece or similarl types of construction.

One of theleading 'objects of the present invention is the provision of an improved construction in whichweaving or wabbling movement of the lever about the pivot on account of undue wear of the parts at' this point shall be obviated, in whichthe action of the mounting shall be extremely free and easy and undesirable friction reduced to a minimum and in which accidental loosening of the pivot on account of friction of the moving parts of the mounting there-against shall be eliminated.

A further object of the present invention is the provision of an improved friction eliminating construction of the character above described, which shall embody means for retaining one end ofthe spring and shall consequently be particularly adapted for use with improved types of lens clip, in which the usual lens engaging shoes ordinarily serving to retain one end of the spring are eliminated.

A A further object of the present invention is the provision of a novel and improved construction of ophthalmic mounting, in which the several parte may be readily and easily assembled without the necessity of employment of special tools' for holding the parts during the assembling operation.

Other objects and advantages of my improved construction should be readily apparent by reference to the following specifi- 'cation taken in connection-with the accompanying drawings, and it will be -understood that l may make any modifications in the specific details of construction shown and described within the scope of the appended claiiiiswithout departing from or exceeding the' spirit of niiy' inventions Figure l represents a. front view of a mounting embodying my invention.

Fig. Il represents an enlarged vertical sectional view of one form thereof.

Fig. lll represents a similar view of another form.

.F ig. IV represents a similar view of a slight improvement over Fig. lll.

Fig. V represents a corresponding view of another forni of my invention.

In the drawings, in which similar characters of reference are employed to denote corresponding parts throughout the several views, the numeral l designates the bridge member of an ophthalmic mounting, which l have shown as provided with the lens engaging clip members 2 for retaining in position the lenses 3 of the mounting.

ln Fig. Il, l have illustrated in detail one form of my invention in which the bridge l is provided with the seat 4 for the lever 5, and has secured in and rising from the seat 7J.- the hollow post 6 through which extends the screw 7 having the head 8 overlying the other parts adjacent the pivot for retaining these parts in position, said screw 7 preferably having the lower end headed or spun over as at 9 to lock it in position. Surrounding the post 6 is the loose tube or cylinder l0 slightly less in length than the height ofthe projecting portion of the post- 6 and of size to 'sl-idingly lit said post while encircling said member 10 is the tube l1 secured to or forming a part of the-'lever 5, and projecting `upwardly therefrom substantially into engagement with the head 8 of the screw. An actuating spring 12 rests on the body portion of the lever and extends upward around the tube 11 and is shown with one end extending outward into engagement with the shoe portion 13 of the lens clip 2.

it vwill thus be seen that in this form of my invention l have provided the rigidly held or non-rotatingpost 6 about which is mounted the lever l() with. its tube ll, while interposed between the fixed post and thel lever and tube is the loose cylinder 10 which'is free to move or slide around between the parts so that on swinging of the pivotever this member forms a species of sliding bearing between.v the parts capable of move- .nient with' the' lever' or of remaining stationary and having the lever swing thereabout, or as will ordinarily occur in practice, moving in the direction of movement of the lever but at a slightly slower rate so that it will have a certain rolling or sliding movement on the fixed post and the lever and its tube will have a sliding movement on the cylinder so that friction of turning movement is reduced to a minimum.

In Fig. III, I have shown a slight modification ot the invention just described, in which I also employ the cylinder 1() and lever 5 with its tube 11 and the actuating spring 12. In this form, however, in place of having the hollow post secured within the bridge and the securing screw 7 extending down thereinto I have employed the slide post 14 having the lower end screwed .or suitably secured in the bridge seat 4 and having the upper end provided with a reduced threaded extension or stud 15 having a groove 16 to receive the tongue 17 of the washer 18, which is thus locked by the tongue against rotation on the post and held in position thereon as by the nut 19, the construction and operation of the parts other than the post and its retaining device being substantially as previously described.

In Fig. IV, I have shown another modification of my invention adapted for use in connection with those forms of lens clips not having the shoes 18, this form, like the form shown in Fig. III, having the washer 18 held' .against rotation on the post 14 and having the spring end received in the recess or aperture 20 of the washer. This form possesses an additionalV frictional eleminating device consisting in a supplemental loose Washer 21 loosely mounted above the upper ends of the cylinder 10` and tube 11 and adapted to move about the post and preferably concealed in the recess 22 of the washer 18,this member being capable of movement relative to the washer to eliminate any possible friction should the tube ride upon the cylinder 10 and come in engagement with the inner face of the looking or retaining Washer 18.

In Fig. V, I have illustrated a :further form of my invention especially adapted f'or use in those instances in which it is desired to obtain maximum ease of assembling of the parts of the mounting and at the same time the desired elimination of friction. In this f'orm I have shown my lever 5 with its tube 11, whiletelescoping Within the tube 11 and lever 5 is the `cylinder 10 having at its outer end the outwardly extending peripheral flange 21', while depending through the said parts is the post 14 having at its upper end the head 23' and on its lower end an angular or squared portion 24 terminating in the threaded stud 25 engaged by the lock nut 26 which serves to draw the post against the seat 4 of the bridge and lock it in position,

While the engagement of the squared portion 24 of the post, With a correspondingly shaped recess or aperture in the bridge absolutely locks and holds the post against rotating movement.

In the employment of this form of my invention it is necessary first to place the spring about the tube 11 and to then place the cylinder 10 within the tube and press downwardly, when the parts will telescope until the flange 21 engages the upper part of the tube, when the parts will be held in place and eliminate any loss or movement out of posit-ion during the assembly.

'Io then secure the several parts in position the post 14 is placed wit-hin the cylinder 10 and the several partsI may be readily held together as by grasping of the lever 4 between the thumb and second finger ot one hand, with the first finger pressing on the head 23. The parts are then brought into engagement with the seat 4 of the bridge and the squared head of the post pressed downward therethrough and the nut 26 tightened to secure the several parts together.

It will thus be seen that with this particular form of my invention the severa-l parts of the mountingmay be more readily assembled than the parts of any known mounting of the prior art, While at the same time the central post o-r pivot member 14 is held against accidental rotation and the cylinder 10 with its flange 21 are interposed between the head lof the post and the body of the `post and the lever and its tube and may have a sliding movement between said parts to eliminate any liability of' sticking. or other t'riction tending to interierewith the easy operation of the parts, and thus I attain the several specified objects of my invention in a particularly eflicient and desirable manner. Similarly, in connection with the forms of my invention illustrated in connection with Figs. III and IV, it will be understood that on account of the fixed post the several parts may be easily successively applied to the post, while in connection with the form shown in Fig. IV after the several parts have been applied the washer member 18 may if desiredloe heldjust above the post and engage the end of the spring andthen turned to engage the desired tension on the spring and the tongue slipped into its locking slot, for this purpose more than one aperture 20 for engagement with, the end of the spring-beingyemployed if desired.

I claim:

1. In an ophthalmic mounting, the combination with a support, of a pivot carried thereby, a cylinder loosely mounted on the pivot, a lever having a tube loosely mounted on the cylinder and an actuating spring for the lever encircling the tube and out of engagement with both .the pivot andcylinder.

2. The combination with a support having a fixed pivot secured thereto and rising therefrom, of aA lever having a tubular portion for encircling the pivot and an antiriction cylinder loosely interposed between the pivot and tube ot' the lever, substantially as and for the purpose described.

3. A mounting of the character described, including a support, e pivot rising from the support, a lever mounted on the pivot, a

tubular portion rising from the lever, an actuating spring for the lever encircling the tubular portion, means for retaining said parts on the pivot and friction reducing means interposed between the tube of the lever and the pivot of the support.

4f. ln a device of the character described, 'the combination with a support, a pivot rising therefrom, a lever' having a tube surrounding the pivot, an actuating spring for the lever encircling the tube, anti-friction means interposed between the pivot and the tube on the lever, means on the pivot overlying the parts for securing them in position t ereon, an anti-friction means interposed between the upper end of the tube and the overlying port-ion of the pivot.

5. A device of the character described, including a support, a pivotrigidly secured thereto and rising therefrom, a lever having a tubular portion surrounding the ivot, an actuating spring surrounding sai tubular portion, means on the pivot overlying and substantially engaging the upper end of the tube for retaining the spring and tube in proper relation, and interlocking means on the spring` and overlying portion of the pivot for securing one end of the spring against movement relative to the support.

In testimony whereof I have aiiiXed my signature, in presence of two witnesses.

JOEL C. "WELLS,

Witnesses:

H. E. COLEMAN, E. M. HALvoRRnN.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. G. 

